AWK - Hard to understand for me

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# 15  
$ nawk -F\| '!/#/{print $4}' SNA_DB_UPG.list | sort -u
$PLATFORM_BIN/reload_ctl layerRateMap
$PLATFORM_BIN/reload_ctl neModifier

This User Gave Thanks to itkamaraj For This Post:
# 16  
Thank you sooo much.. itkamaraj.

It worked for me... but can you please explain me
awk -F\| '!/#/{print $4}' SNA_DB_UPG.list | sort -u

nawk doesn't seems to be working for my shell...

Last edited by ambarginni; 03-16-2012 at 06:40 AM..
# 17  
-F\| --> Filed seperator is |

!/#/ --> process the lines which is not having #

print $4 --> print the 4th filed ( seperated by | )

sort -u --> print only unique values from the awk command output
This User Gave Thanks to itkamaraj For This Post:
# 18  
Kudos to you itkamaraj!!

# 19  
Thanks to all readers and specially to itkamaraj...

But I stucked with the below requirement please help me... I wanted the output as:
* I do NOT wanted to sort the command/fourth field values/instructions
* And also want to remove the duplicate values

As below:

$PLATFORM_BIN/reload_ctl neModifier
$PLATFORM_BIN/reload_ctl layerRateMap

# 20  

awk -F\| '!/^#/{print;if(!A[$4]++)print $4>f}' f=DISTINCT_MODEL.list SNA_DB_UPG.list > SPEC_INSTR.list

# 21  
Thanks Scrutinizer,

I believe you have seen the complete thread conversation to post the above solution, But after itkamaraj suggestion I have changed the way... I am generating only one file now SPEC_INSTR and there will be no file as DISTINCT_MODEL.list

means I wanted to implement the below command:

awk -F\| '!/#/{print $4}' SNA_DB_UPG.list | sort -u .

without sort but with unique values only.

Thanks again for your time.

Regards, Ambar

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